*, :after, :before, ::after, ::before {
  box-sizing: border-box;
}
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre, a,
abbr, acronym, address, big, cite, code, del,
dfn, em, img, ins, kbd, q, s, samp, small, strike,
strong, sub, sup, tt, var, b, u, i, center, dl, dt,
dd, ol, ul, li, fieldset, form, label, legend, table,
caption, thead, tbody, tfoot, tr, th, td, article,
aside, canvas, details, embed, figure, figcaption,
header, footer, hgroup, menu, nav, output, ruby,
section, summary, time, mark, audio, video {
  padding: 0;
  margin: 0;
  // border: 0 none;
  // font: inherit;
  // font-size: 100%;
  // vertical-align: baseline;
}
article, aside, details, figcaption, figure,
header, footer, hgroup, menu, nav, section {
  display: block;
}
body {
  line-height: 1;
}
ol, ul, li {
  list-style: none;
}
blockquote, q {
  quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}
a, a:hover {
  color: inherit;
  text-decoration: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
button, input {
  border: 0 none;
}
input {
  outline: 0 none;
}
img {
  display: block;
}
// html, body {
//   width: 100%;
//   height: 100%;
//   font-family: 'PingFangSC-Light', 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light';
// }

// 浮动与清除
.fl {
  float: left;
}
.fr {
  float: right;
  .button-group-item {
    padding-left: 3px;
  }
}
.clearfix {
  zoom: 1;
  &:after {
    display: block;
    content: '';
    clear: both;
    visibility: hidden;
    height: 0;
  }
}